On 2020-02-07 07:11:06 [+0100], Mike Galbraith wrote: > drm/i915/gt: use a LOCAL_IRQ_LOCK in __timeline_mark_lock() > > Quoting drm/i915/gt: Mark up the nested engine-pm timeline lock as irqsafe > > We use a fake timeline->mutex lock to reassure lockdep that the timeline > is always locked when emitting requests. However, the use inside > __engine_park() may be inside hardirq and so lockdep now complains about > the mixed irq-state of the nested locked. Disable irqs around the > lockdep tracking to keep it happy. > > This lockdep appeasement breaks RT because we take sleeping locks between > __timeline_mark_lock()/unlock(). Use a LOCAL_IRQ_LOCK instead. > > Signed-off-by: Mike Galbraith <efaukt@xxxxxx> Applied, thank you. Sebastian
